<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表数据排序</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入姓名" v-model="filterWord">
        <button @click="sortType = 0">原顺序</button>
        <button @click="sortType = 1">年龄升序</button>
        <button @click="sortType = 2">年龄降序</button>
        <ul>
            <li v-for="per in filterArr" :key="per.id">
                {{per.name}} - {{per.age}}
            </li>
        </ul>
    </div>
    <script type="text/javascript">
        const vm = new Vue({
            el: "#root",
            data:{
                sortType: 0, // 0原顺序、1升序、2降序
                filterWord:'',
                personArr:[
                    {id:'001',name:'马冬梅',age:38},
                    {id:'002',name:'周冬雨',age:21},
                    {id:'003',name:'周杰伦',age:40},
                    {id:'004',name:'艾伦',age:18}
                ]
            },
            computed:{
                filterArr(){
                    const arr = this.personArr.filter((p) => {
                        return p.name.indexOf(this.filterWord) != -1
                    })
                    if(this.sortType != 0){
                        arr.sort((p1,p2) => {
                            return this.sortType === 1 ? p1.age - p2.age : p2.age - p1.age
                        })
                    }
                    return arr
                }
            }
        })
    </script>
</body>
</html>